temporalio/temporal · error

Unknown DC redirection policy %v

Error message

Unknown DC redirection policy %v

What it means

RedirectionPolicyGenerator constructs the DC (datacenter) redirection policy indicated by policy.Policy. It panics on any policy value other than Noop, AllAPIsForwarding, or SelectedAPIsForwarding, since there is no defined behavior for unknown policies.

Source

Thrown at common/rpc/interceptor/dc_redirection_policy.go:106

	enabledForNS dynamicconfig.BoolPropertyFnWithNamespaceFilter,
	selectedAPIsOnlyForNS dynamicconfig.BoolPropertyFnWithNamespaceFilter,
	namespaceRegistry namespace.Registry,
	policy config.DCRedirectionPolicy,
) DCRedirectionPolicy {
	switch policy.Policy {
	case DCRedirectionPolicyDefault:
		// default policy, noop
		return NewNoopRedirectionPolicy(clusterMetadata.GetCurrentClusterName())
	case DCRedirectionPolicyNoop:
		return NewNoopRedirectionPolicy(clusterMetadata.GetCurrentClusterName())
	case DCRedirectionPolicySelectedAPIsForwarding:
		currentClusterName := clusterMetadata.GetCurrentClusterName()
		return NewSelectedAPIsForwardingPolicy(currentClusterName, enabledForNS, selectedAPIsOnlyForNS, namespaceRegistry)
	case DCRedirectionPolicyAllAPIsForwarding:
		currentClusterName := clusterMetadata.GetCurrentClusterName()
		return NewAllAPIsForwardingPolicy(currentClusterName, enabledForNS, selectedAPIsOnlyForNS, namespaceRegistry)
	default:
		panic(fmt.Sprintf("Unknown DC redirection policy %v", policy.Policy))
	}
}

// NewNoopRedirectionPolicy is DC redirection policy which does nothing
func NewNoopRedirectionPolicy(currentClusterName string) *NoopRedirectionPolicy {
	return &NoopRedirectionPolicy{
		currentClusterName: currentClusterName,
	}
}

// WithNamespaceIDRedirect redirect the API call based on namespace ID
func (policy *NoopRedirectionPolicy) WithNamespaceIDRedirect(_ context.Context, _ namespace.ID, _ string, _ any, call func(string) error) error {
	return call(policy.currentClusterName)
}

// WithNamespaceRedirect redirect the API call based on namespace name
func (policy *NoopRedirectionPolicy) WithNamespaceRedirect(_ context.Context, _ namespace.Name, _ string, _ any, call func(string) error) error {
	return call(policy.currentClusterName)

View on GitHub (pinned to bde624efd1)

Solutions

1. Use a supported policy: DCRedirectionPolicyNoop, DCRedirectionPolicyAllAPIsForwarding, or DCRedirectionPolicySelectedAPIsForwarding
2. Fix the dynamic config/cluster metadata supplying the unknown policy value
3. Upgrade the binary so it recognizes the newer policy enum

Example fix

// before
policy := dcRedirectionPolicy{Policy: 99}
generator := rpc.NewRedirection(policy, ...)
// after
policy := dcRedirectionPolicy{Policy: enumspb.DCRedirectionPolicyNoop}
generator := rpc.NewRedirection(policy, ...)

switch policy.Policy {
case enumspb.DCRedirectionPolicyNoop,
     enumspb.DCRedirectionPolicyAllAPIsForwarding,
     enumspb.DCRedirectionPolicySelectedAPIsForwarding:
    // ok
default:
    return fmt.Errorf("unsupported DC redirection policy %v", policy.Policy)
}

func() (p rpc.RedirectionPolicy) {
    defer func() {
        if recover() != nil { p = rpc.NewNoopRedirectionPolicy(clusterName) }
    }()
    return generator()
}()

When it happens

Trigger: Calling NewRedirection with a DCRedirectionPolicy whose Policy field holds an invalid/unregistered enum value — e.g. after adding a new policy enum on the client without updating this generator, or a corrupt/mistyped dynamic config value.

Common situations: Version skew: newer cluster config sets a policy enum an older binary does not know; typo in config mapping to an undefined policy value.

Related errors

• unable to decode cassandra serial consistency: %v
• only one of certData or certFile properties should be specif
• failed to get workflow execution history
• GetWorkflowExecutionHistory failed
• unable to create metrics handler: %w

AI-assisted analysis of temporalio/temporal@bde624efd1 (2026-09-01). Data as JSON: /api/errors/f42c9873b745823e. Report an issue: GitHub.